• Proceedings of the Korean Institute Of Construction Engineering and Management
• /
• 2007.11a
• /
• pp.953-956
• /
• 2007

"Eco-friendly construction"is an emerging issue in the building industry. Main purpose of the eco-friendly construction is to sustain the health and environment of building residents and to minimize the harmful effect on their environment. Apartment residents have great concern on eco-product, since many cases are reported that Sick Building Syndrome is caused by toxic substance from building materials. Environmental performance is to meet through using the highest grade eco-friendly materials. However, generally eco-friendly materials are more expensive than normal materials. Therefore using eco-friendly materials at public housing project is limited to economical aspect. The purpose of this paper is development of eco-friendly material selection model considered cost efficiency. The selection of Eco-friendly finishing materials and their methods are constructed to consider environmental performance level and cost index compositively. Development of eco-friendly material selection method is economic and reasonable one when public housing is constructed.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.34 no.10A
• /
• pp.760-768
• /
• 2009

In this paper, we propose the energy efficient transmission parameter selection method for Wireless Personal Area Network (WPAN) system which is applied to e-Navigation system considering various ship models environment. An appropriate selection of transmission parameters of HR-WPAN system is very essential to be considered for saving WPAN devices' energy consumption, when HR-WPAN system is applied to ship area network (SAN). Therefore, we propose an energy consumption model for a ship area network employing IEEE 802.15.3 based CSMA/CA HR-WPAN model and analyze the effect of transmission parameter selection on the performance of energy consumption. In particular, the path loss is the major performance decision parameter for the SAN employing HR-WPAN system, since it varies according to the material of shipbuilding such as steel(for large ship), FRP(for medium size ship) and compound wood(for small ship). Thus, we analyze and demonstrate that the proper transmission parameter selection of transmit power, PHY data rate and fragment size for each ship model could guarantee energy efficiency.

• Journal of the Korean Society for Marine Environment & Energy
• /
• v.5 no.1
• /
• pp.19-29
• /
• 2002

In this paper, the selection of transport route for import-export container cargo based on the sacrifice model and CO₂ emission was investigated. At first, the transportation of import-export container cargo, the transport share of each transport route, the CO₂ gas emission, the sacrifice model and the time value of import-export container cargo were investigated. And next, the selection of transport route based on the sacrifice model was investigated for the transport of import-export container cargo from Seoul to Pusan Port. Finally, the transport route was also selected by using the sacrifice model including the effect of CO₂ emission. The research results show that the transport route selection results of import-export container cargo based on the sacrifice model represents the present status of the transportation of import-export container cargo very well. And also the research results show that the reduction of transport time was very effective to increase the share of coastal transportation.

• Journal of KIISE:Databases
• /
• v.31 no.6
• /
• pp.585-595
• /
• 2004

A query processing is a critical issue in data warehouse environment since queries on data warehouses often involve hundreds of complex operations over large volumes of data. Data warehouses therefore build a large number of materialized views to increase the system performance. Which views to materialized is an important factor on the view maintenance cost as well as the query performance. The goal of materialized view selection problem is to select an optimal set of views that minimizes total query response time in addition to the view maintenance cost. In this paper, we present an efficient solution for the materialized view selection problem. Although the optimal selection of materialized views is NP-hard problem, we developed a feasible solution by utilizing the characteristics of relational operators such as join, selection, and grouping.

• The Journal of the Korea Contents Association
• /
• v.21 no.9
• /
• pp.322-332
• /
• 2021

In this study, the relationship between Customer Satisfaction and Selection Attributes of Hotel Michelin Restaurant was studied. It was attempted to investigate the influence relationship on whether there is a moderating effect by introducing a variable into the Hotel Brand Image. Convenience sampling was used for customers who have recently experienced Hotel Michelin Restaurant, which is currently located in a hotel in Seoul. It has been held for about 60 days from July 1, 2020. The survey tool constructed through prior research was distributed to customers who have experienced the Michelin Restaurant commissioned by hotels in Seoul. 287 copies of the collected effective specimens were statistically processed using SPSS 22.0. As a result of the empirical analysis of this study, it was found that among the factors of Selection Attributes, physical environment, food quality, service quality, and convenience had a significant positive (+) effect between customer satisfaction. It was found that price fairness had no influence. Finally, it was found that there is a moderating effect on the physical environment and service quality variables by introducing the interaction variable between Selection Attributes and Customer Satisfaction.

• Proceedings of the Korean Society of Environment and Ecology Conference
• /
• 2009.04a
• /
• pp.51-55
• /
• 2009

• Proceedings of the Korean Society of Environment and Ecology Conference
• /
• 2011.04a
• /
• pp.79-82
• /
• 2011

• Proceedings of the Korean Society of Environment and Ecology Conference
• /
• 2008.04a
• /
• pp.100-102
• /
• 2008

• Proceedings of the Korean Society of Environment and Ecology Conference
• /
• 2008.04a
• /
• pp.131-133
• /
• 2008

• Proceedings of the Korean Society of Environment and Ecology Conference
• /
• 2008.04a
• /
• pp.34-37
• /
• 2008